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Best email provider against spam?
(lemy.lol)
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Self hosted.
That’s not a good idea anymore. Especially if you want any assurances that your email will actually be delivered. You’ll be spending a lot of time dealing with non-delivery, blacklists, and spam filters.
I've found that you're fine as long as you pass all the SPF/DKIM steps, have an SSL cert and use your ISP's mail relay.
The biggest issue I face is that occasionally a legit mail server refuses to support SSL/TLS and my server drops the connection. The other 99% of unencrypted mail is spam.
What self-hosted solution do you recommend?
I would not suggest self-hosted, but if you really want to then Mailcow is the easy suggestion.